Electrical Equipment In Explosion Hazard Zones; Maintenance And Repair Instructions - ABB EL6010 Operator's Manual

Electrical Equipment in Explosion Hazard Zones:

Maintenance and Repair Instructions

Monitoring and
Inspection
Work on Electrical
Systems
Work on Intrinsically
Safe Circuits
Explosion Risk
Personnel
Qualifications
Original Parts
Testing Prior to
Returning to Service
Manufacturer's
Repairs
72
The condition of electrical systems in explosion risk areas must be monitored. As
necessary, and at least ever three years the system shall be inspected by a quali-
fied electrician if it is not under continuous monitoring by a responsible engineer.
The power supply must be disconnected before performing any work on electrical
systems in explosion risk areas. The breaker is to be fitted with an appropriate
label, e.g. "Do Not Turn On – Risk of Explosion".
This does not apply to devices that are opened during operation, e.g. cleaning
apparatus, or to devices which have been expressly type certified for such
operation.
Work may be performed on intrinsically safe circuits in explosion risk areas even
while power is connected.
However, the electrical characteristics (inductance, capacitance, current and
voltage) of test equipment should be noted when such equipment is activated.
Special attention is required if work is carried out on intrinsically safe circuits set
up in conjunction with Zone 0 areas.
The explosion risk should be eliminated prior to carrying out any repair work.
Repair work should only be performed by qualified personnel.
Only original parts should be used for repairs.
If repairs are made on components in an electrical device necessary for explosion
protection, prior to any return to service a qualified person shall inspect this device
and certify that its explosion protection features are in compliance with the type
and design requirements as stated in the device's certification documentation.
Repairs can also be carried out by the manufacturer, e.g. on site by an ABB
Service employee or at the manufacturer's facility.
In this case the repair carried out and the subsequent inspection will be shown on
the device identification plate. An inspection by an expert is not required in such a
case.
EL6010 Gas Analyzer in Category 2G Operator's Manual 42/24-30 EN Rev. 1